# # Data product developed by Dr. E. Thiemann from the # Laboratory for Atmospheric and Space Physics, Boulder, Colorado # in the frame of the PROBA2 guest investigator program. # # Please address your questions to E. Thiemann (thiemann@lasp.colorado.edu) and # to the LYRA Principal Investigator M. Dominique (marie.dominique@oma.be) # # PROBA2 data products are open to all. # Users should however refer to the following paper: http://arxiv.org/abs/1708.08833 # and acknowledge the instrument according to the rules described # at http://proba2.oma.be/data/termsOfUse in their papers and presentations # # Website reference http://proba2.oma.be/lyra/data/EarthAtmosphere/ # # Description: # Summed neutral N2 and O number density profiles, spanning altitudes between 150 and 400 km # retrieved from LYRA data acquired during occultations by the unit 3 (backup unit) zirconium # channel (bandpass: 1-2 nm + 6-20 nm). # # Radial distance is the distance from the center of Earth expressed in km to which the density corresponds. # Density O-N2 provides the summed number density of neutral O and N2 in units of radial distance and cm^-3. # The systematic error is a signed value (asymmetric) in fractional units and is primarily from the error made by # assuming that the absorption cross-sections of O and N2 are equal; a secondary source of systematic error is # from using a single-scale height atmosphere in the reference atmosphere used by the retrieval algorithm. # The random error is an unsigned value (to be applied symmetrically to the measurement) in fractional # units and gathers the uncertainties from solar spectra, solar variability and measurement noise. # Both uncertainties are described in http://arxiv.org/abs/1708.08833. # The Longitude and Latitude (in degrees) columns refer to the tangential point along the # line-of-sight, where most of the absorption occurs. # # Scale height = 38.031605 km # Date (UTC) = 2010-12-21T08:52:48.837 # Date (julian) = 2455551.87000969 # # Radial distance Density O-N2 Systematic error Random error Longitude Latitude 6509.0122 9.0510261e+10 0.089178287 0.035000801 -20.253912 43.064682 6511.3090 7.6969373e+10 0.099561531 0.035693408 -20.339568 42.958041 6513.6058 6.6804355e+10 0.11028302 0.036386015 -20.419690 42.857888 6515.9027 5.8997130e+10 0.12138369 0.037078622 -20.499811 42.757246 6518.1995 5.2569867e+10 0.13281048 0.037771230 -20.579923 42.653100 6520.4964 4.7254983e+10 0.14458045 0.038463837 -20.660035 42.548953 6522.7932 4.2542129e+10 0.15444203 0.039124965 -20.742654 42.444808 6525.0901 3.8517519e+10 0.16085238 0.039771936 -20.826771 42.340663 6527.3869 3.5049711e+10 0.16539964 0.040997370 -20.909852 42.237037 6529.6838 3.1958106e+10 0.16937398 0.043324940 -20.985958 42.136897 6531.9806 2.9120671e+10 0.17292416 0.046655947 -21.062065 42.036757 6534.2774 2.6412290e+10 0.17432629 0.048022168 -21.147046 41.925842 6536.5743 2.3737273e+10 0.17480478 0.048304327 -21.237173 41.808677 6538.8711 2.1280221e+10 0.17539289 0.049580874 -21.323160 41.696894 6541.1680 1.9221444e+10 0.17510119 0.051272057 -21.403282 41.592734 6543.4648 1.7518869e+10 0.17404151 0.051503886 -21.483404 41.488574 6545.7617 1.6114351e+10 0.17211637 0.052462391 -21.559841 41.388103 6548.0585 1.4847792e+10 0.16998716 0.053685117 -21.635948 41.287963 6550.3553 1.3688762e+10 0.16708615 0.055074336 -21.712054 41.186137 6552.6522 1.2686142e+10 0.16401761 0.055422610 -21.788161 41.081992 6554.9490 1.1747289e+10 0.16108126 0.054852295 -21.864267 40.977847 6557.2459 1.0821609e+10 0.15817712 0.053711989 -21.949171 40.865829 6559.5427 9.8988237e+09 0.15507835 0.052325923 -22.034791 40.753170 6561.8396 9.0185510e+09 0.15198438 0.050958960 -22.110879 40.646508 6564.1364 8.2587794e+09 0.14866521 0.048709775 -22.182990 40.542348 6566.4333 7.6090670e+09 0.14620016 0.046937792 -22.255937 40.438191 6568.7301 7.0371124e+09 0.14390438 0.045100526 -22.332043 40.334046 6571.0269 6.5089476e+09 0.14185703 0.044495916 -22.408150 40.229901 6573.3238 6.0250262e+09 0.13950218 0.043397649 -22.481400 40.128612 6575.6206 5.5811328e+09 0.13669282 0.041752018 -22.553501 40.028472 6577.9175 5.1713524e+09 0.13365757 0.038779239 -22.625602 39.927465 6580.2143 4.8080237e+09 0.13034274 0.036322690 -22.697703 39.823319 6582.5112 4.4760171e+09 0.12717811 0.035154693 -22.769804 39.719173 6584.8080 4.1514578e+09 0.12408725 0.034075358 -22.848393 39.608898 6587.1049 3.8233003e+09 0.12099972 0.033181601 -22.929507 39.496239 6589.4017 3.5082541e+09 0.11782884 0.032249047 -23.006112 39.387837 6591.6985 3.2316161e+09 0.11403005 0.028413688 -23.078222 39.283678 6593.9954 3.0003431e+09 0.11014734 0.026176815 -23.150298 39.179520 6596.2922 2.7991042e+09 0.10579592 0.025725945 -23.218409 39.075373 6598.5891 2.6136820e+09 0.10213509 0.025125921 -23.286504 38.971227 6600.8859 2.4218937e+09 0.10042976 0.026811157 -23.361215 38.862755 6603.1828 2.2306718e+09 0.098457427 0.026555079 -23.442329 38.750096 6605.4796 2.0469820e+09 0.097439003 0.027067394 -23.519681 38.639898 6607.7764 1.8876726e+09 0.095674032 0.024173800 -23.587776 38.535753 6610.0733 1.7528254e+09 0.092812821 0.024073009 -23.655871 38.431608 6612.3701 1.6387460e+09 0.090799192 0.024044199 -23.723974 38.330627 6614.6670 1.5341815e+09 0.089879367 0.023480968 -23.792078 38.230474 6616.9638 1.4364133e+09 0.088600896 0.023433571 -23.860179 38.129138 6619.2607 1.3551780e+09 0.088002403 0.024588810 -23.928274 38.024993 6621.5575 1.2713167e+09 0.087119985 0.024904656 -23.996369 37.920849 6623.8544 1.1883536e+09 0.085318740 0.024808352 -24.071273 37.809894 6626.1512 1.1028693e+09 0.084157753 0.026398259 -24.147882 37.697235 6628.4480 1.0228730e+09 0.082554784 0.025885006 -24.217220 37.589519 6630.7449 9.5680962e+08 0.080878225 0.025930137 -24.281309 37.485373 6633.0417 8.9437765e+08 0.079429781 0.026159539 -24.346453 37.380510 6635.3386 8.3610646e+08 0.077790521 0.026450562 -24.423061 37.267851 6637.6354 7.7708687e+08 0.076402920 0.025850201 -24.499669 37.155192 6639.9323 7.2009585e+08 0.076075928 0.025294862 -24.565455 37.049887 6642.2291 6.7130566e+08 0.076041740 0.025161072 -24.629553 36.945728 6644.5260 6.2533990e+08 0.074880734 0.025400450 -24.693648 36.843052 6646.8228 5.8656750e+08 0.073564494 0.026346055 -24.757737 36.742912 6649.1196 5.5339522e+08 0.072134359 0.027468766 -24.821826 36.642772 6651.4165 5.1920304e+08 0.071628519 0.026803342 -24.892906 36.527777 6653.7133 4.8417506e+08 0.071063158 0.027889862 -24.965008 36.410611 6656.0102 4.4909938e+08 0.069478009 0.028032348 -25.031875 36.304570 6658.3070 4.2001776e+08 0.068272303 0.030605583 -25.095964 36.204430 6660.6039 3.9561821e+08 0.067147622 0.032174880 -25.160603 36.101619 6662.9007 3.7372321e+08 0.066186702 0.032538922 -25.228199 35.984454 6665.1976 3.5074281e+08 0.065893819 0.028223436 -25.295795 35.867289 6667.4944 3.2719897e+08 0.065693318 0.027285057 -25.360110 35.766078 6669.7912 3.0798639e+08 0.065201442 0.027543045 -25.424208 35.665924 6672.0881 2.9131673e+08 0.065266420 0.026930654 -25.489851 35.560249 6674.3849 2.7421244e+08 0.064484067 0.029279502 -25.557447 35.447590 6676.6818 2.5845858e+08 0.062387918 0.032153121 -25.623371 35.336825 6678.9786 2.4277148e+08 0.061790327 0.030282074 -25.683455 35.232679 6681.2755 2.2866158e+08 0.063128002 0.029868686 -25.743538 35.128533 6683.5723 2.1666421e+08 0.063781939 0.032027298 -25.812347 35.018206 6685.8691 2.0209759e+08 0.063537731 0.033622871 -25.884449 34.905547 6688.1660 1.9080199e+08 0.061152834 0.033823507 -25.948428 34.799234 6690.4628 1.7964880e+08 0.059536008 0.033062822 -26.004506 34.699094 6692.7597 1.6936917e+08 0.058779197 0.031883159 -26.060715 34.598760 6695.0565 1.5920205e+08 0.058365162 0.029849091 -26.128300 34.481612 6697.3534 1.4945900e+08 0.057935776 0.030135985 -26.195895 34.364447 6699.6502 1.4068127e+08 0.056646940 0.030990473 -26.263499 34.250834 6701.9471 1.3324198e+08 0.055017812 0.032799046 -26.331105 34.138159 6704.2439 1.2594883e+08 0.055634933 0.036297321 -26.394404 34.032661 6706.5407 1.1816294e+08 0.055813109 0.039387527 -26.454488 33.932521 6708.8376 1.1271786e+08 0.055603760 0.040955682 -26.514800 33.831086 6711.1344 1.0760628e+08 0.054189046 0.040845179 -26.577889 33.713921 6713.4313 1.0190354e+08 0.052370055 0.045246457 -26.640978 33.596755 6715.7281 94972924. 0.050793890 0.048123289 -26.704068 33.483452 6718.0250 89246441. 0.048998619 0.049851293 -26.767158 33.370793 6720.3218 84818161. 0.048410329 0.050382479 -26.828330 33.266120 6722.6187 82192654. 0.048295645 0.049840389 -26.888413 33.165981 6724.9155 77333312. 0.044559285 0.042281681 -26.948922 33.064071 6727.2123 72631615. 0.043173048 0.040677488 -27.012011 32.951412 6729.5092 68018353. 0.042885420 0.040706043 -27.075100 32.838753 6731.8060 61487289. 0.041540237 0.043354170 -27.138189 32.721936 6734.1029 56897067. 0.041061217 0.049347410 -27.201278 32.604769 6736.3997 53220647. 0.043592456 0.051866158 -27.264374 32.490760 6738.6966 55076376. 0.045096781 0.061155978 -27.327473 32.378084 6740.9934 54755742. 0.047042714 0.065747423 -27.388384 32.265416 6743.2902 54009410. 0.040620691 0.073005450 -27.446966 32.152757 6745.5871 50431840. 0.032897260 0.078813695 -27.506744 32.040098